Smoke-preventing furnace



{N.o Model.) l

. E. R. STBGE..

SMOKBPRVENTING FUMIAGB.v

16.260,625. y Patented July 4; 188,2. T57. @L

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,UNITED STAT-Es PATENT OFFICE.

EowARnR. srEGE, oFoHIoAGo, ILLINOIS.

SMOKE-PREVENTING FURNACE.

SPECIFICATIONV forming part of Letters Patent No. 260,625, dated July 4, 1882.

Application tiled December 27, 1881. (No model.)

To all whom it may concern: A

Be it known that I, EDWARDR. STEGE, of Chicago, in the county of- Cook and State of Illinois, have-invented certain new and-useful Improvements in Smoke-Preventing-Furhaces; and IA do hereby declare that the following is a full, clear, andv exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specication. The nature of myinvention relates to devices for bringing about a perfect combustion ofthe fuel in boiler or other furnaces; and it consists ot' a combination of devices heretofore separately secured by Letters Patent No. 200,674, granted to me February 26, 1878, and No. 219,994, granted to me November 23, 1879, comprising an arrangement of 'a steam-blast from under the grate, asteam-blast from above the grate, and a perforated secondary fueldoor. Neither one of the devices claimed in the above-specified patents brought about the result aimed at; but since both were combined the result was all that could be desired, and the raising of smoke has been entirely prevented with a reasonable adjustment of the steam-blast.

In the accompanying drawings, Figure 1 represents an elevation of the boiler-front with my attachments; Fig. 2, a similar elevation with the exterior fuel-door opened. Fig. 3 is a longitudinal section of the boiler-furnace, and Fig. 4 a transverse-section ofthe same.

Like letters represent corresponding parts in all tbe figures.

Adenotes the boiler B, the boiler-front; (L, the bridgewall; D, the grate, and E the ashpit, all of which are arranged in the usual manner.

lF is a pipe leading from the boiler-dome vertical] y down in front of the boiler-front B. This pipe F has two branches, a and b, each provided with a valve, c and d. The branch a is projected through the center of the boilerfront, and connects with a pipe, G, which is closed at both ends and has a series of small holes, e, drilled through its wall at equal distance apart and on a straight line. This pipe G is placed transversely against thev internal face of the boiler-front above the fuel-door and below the boiler end, and so that the perforations therein will point to the rear end of the, grate, and that thesteam-jets issuing therefrom will blow in that direction.

The grate D is composed of a. series of longitudinal bars, arranged in theusual manner, and supported at their front end upon atransverse supporting-bar,f. The branch b of the steam-supply pipe F extends across the boilerfront B between the fuel andvash-pit doors, `where it passes through the center of such boiler-front into the furnace just below the plane of the grate.

To the inner end of the branch pipe bis centrally connected the blast-pipe H, which is placed transversely beneath the front support,-

f,'of the grate. This pipe H is. closed at its ends, and is provided with steam-openings g on one side, arranged in line with the interstices between the grate-bars and pointing morevor less in an upward direction, so as to direct the jets of steam against the burning fuel on the grate. The steam thus projected. will create a strong ,draft of air tothe fuel at the most desirable point, will loosen the coal so as to get no chance for baking together, whereby the admission of atmospheric air would be prevented, which air is essential for combustion, and will preserve the grate-bars from overheating and burning away. By having this blastpipe H situated directly under the supportingbarf, this pipe is protected from the destructive heat of thefurnace, and also from the falling ashes, so that no ashes will drop upon the pipe or into the steam-openings whenthe blast is not in operation.

I is the fuel-door, hinged to the boiler-front in the usual manner, and J is an auxiliary door, interposed between the door I and the boiler-front B, and swinging on common hinges with the door I. This doorJ is perforated with numerous small holes for admitting atmospheric air above the grate-bars in many small streams. 4

The ash-pit door K is provided with aregister, t', for regulating the amount of air to be ad mitted to the flre from below the grate-bars. When tire is irst started the fuel-door is to be closed and the entire supply of air is to be drawn from the ash pit funtil a sufficient amount of coal has become incandescent. Now the ash-pit door K is closed andlonly the regisroo ter i therein is opened, and the fuel-door I is opened, leaving the perforated door J closed, and next steam is admitted into the perforated plpes G and H, which steam will become superheated, will be decomposed by coming in contact with the particles of incandescent carbon, and Will supply to the tire not only alarge amount of oxygen that will combine with the carbon to form carbonio-acid gas, but also by the highly-combustible hydrogen gases that are set free by the decomposing of the steam and by the oxygen iu the atmospheric air propelled .into the tire by the force of the steam- Jets that will assist to bring about a perfect combustion. These steam-blasts, directed to the incandescent coal upon the grates near the bridge-wall from below and above, will facilitate not only the perfect combustion of the gases generated from the coal which they come in direct contact with, but they Will create such a heat that the gases generated from the coking coal upon the front end of the grate,which have to interiningle With these highly-heated gases before they can pass the bridge-wall,n;i1l be also ignited and consumed. My experiments have proved that neither a steam-blast to the fuel from below the grates nor the same from above the grates, when used independently, will bring about the desired result, but that both combined will bring about a perfect combustion; also, that a sufficient amount of air through multiple orifices, and not in a compact stream, and at the proper location, so as to have time to intcriningle with the gases 'elai m.

IVhat I claim is- The combination, in a boiler-furnace, of a transverse steam-pipe just above the fuel-door, provided with downwardly-tending perforations, and a transverse steam-pipe placed beneath the front support ofthe grate and having perforations arranged in line with the interstices between the grate-bars, in combination with a fuel-door uniformly perforated throughout, and a solid fuel-door to shut oli' the air from the combined steam and air blast, all substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I aflix my signature ill presence of two witnesses.

EDWARD R. STEGE.

Witnesses:

F. W. KASEHAGEN, FRED WILLIAMS. 

